Method for Decelerating a Servomotor of a Steering Device

Abstract

A method is for decelerating a servomotor of a steering device. The steering device includes a control unit for controlling the servomotor, monitoring electronics for monitoring a movement of the servomotor, and an energy store. The energy store has a different configuration from a vehicle battery. The method includes activating the energy store by an external force, and monitoring a movement of the servomotor caused by the external force by evaluating a movement parameter correlated with the movement of the servomotor. The method further includes, in at least one operating state, triggering a deceleration process as a function of the movement parameter, in which deceleration process the servomotor is decelerated using the control unit, the energy store is charged by the movement of the servomotor, and the energy store is used to supply energy to the control unit and the monitoring electronics.

What is claimed is: 
     
         1 . A method for decelerating a servomotor of a steering device, the steering device comprising a control unit for controlling the servomotor, monitoring electronics for monitoring a movement of the servomotor, and an energy store operatively connected to the control unit and the monitoring electronics, the energy store having a different configuration from at least one vehicle battery, the method comprising:
 activating the energy store by an external force;   monitoring a movement of the servomotor caused by the external force by evaluating a movement parameter correlated with the movement of the servomotor; and   in at least one operating state, triggering a deceleration process as a function of the movement parameter, in which deceleration process the servomotor is decelerated using the control unit, the energy store is charged by the movement of the servomotor, and, in at least one application case, the energy store is used to supply energy to the control unit and the monitoring electronics.   
     
     
         2 . The method according to  claim 1 , further comprising:
 using the energy store to supply energy to the control unit and the monitoring electronics when an energy supply from the at least one vehicle battery is interrupted or disrupted.   
     
     
         3 . The method according to  claim 1 , wherein the energy store is arranged in an intermediate circuit between the at least one vehicle battery and power electronics of the steering device. 
     
     
         4 . The method according to  claim 3 , wherein an intermediate circuit capacitance is used as the energy store. 
     
     
         5 . The method according to  claim 3 , wherein the energy store is arranged in parallel with an intermediate circuit capacitance and is connected in the at least one application case. 
     
     
         6 . The method according to  claim 5 , wherein the energy store is configured as a capacitor. 
     
     
         7 . The method according to  claim 5 , wherein a DC link capacitance is disconnected during the at least one application case. 
     
     
         8 . A steering device, comprising:
 a servomotor having a control unit configured to control the servomotor;   monitoring electronics configured to monitor a movement of the servomotor; and   an energy store operatively connected to the control unit and the monitoring electronics,   wherein the energy store is configured differently from at least one vehicle battery of a vehicle that includes the steering device,   wherein the monitoring electronics are configured to monitor a movement of the servomotor caused by an external force by evaluating a movement parameter correlated with the movement of the servomotor, and   wherein, in at least one operating state, the monitoring electronics are configured to trigger a deceleration process for decelerating the servomotor using the control unit, the energy store is charged by the movement of the servomotor, and the energy store supplies the control unit and the monitoring electronics with energy.   
     
     
         9 . A vehicle comprising a steering device according to  claim 8 .